A concrete slope structure for ensuring drainage and stability of a water-permeable soil slope
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- POWERCHINA HUADONG ENG CORP LTD
- Filing Date
- 2025-06-27
- Publication Date
- 2026-07-21
Smart Images
Figure CN224531702U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water conservancy and hydropower engineering technology, specifically to a concrete slope-supporting structure that ensures drainage and stability of seepage-prone soil slopes. Background Technology
[0002] Slope excavation and support are common in water conservancy and hydropower projects. The engineering properties of soil are inherently uncertain and complex, and slope stability is significantly affected by external factors, especially seepage. Besides natural stabilization based on the stable slope ratio, excavated slopes are generally supported using one or more combined methods, such as self-drilling anchors, concrete frame beams, concrete slope lining, and prestressed anchor cables, while also requiring systematic drainage holes. When multiple water-rich seepage paths exist within the slope, the surface of a relatively steep slope is highly susceptible to collapse. A common solution is to use a combination of centralized drainage holes and systematic drainage holes, with drainage pipes plugged into the drainage holes and wrapped with geotextile. The surface is then supported with concrete slope lining and anchors, and blind pipes are installed at the bottom of the slope lining to guide seepage water through the drainage holes via tee connections.
[0003] In the short term, the above-mentioned methods effectively divert seepage water from the drainage holes in the slope. However, after a longer construction period, these drainage holes are prone to blockage, especially on cohesive soil slopes. Poor drainage can lead to soil saturation, affecting slope stability. Remedies typically involve drilling additional drainage holes or flushing the existing ones, but these methods are time-consuming, labor-intensive, and have limited effectiveness. Therefore, it is necessary to implement certain improvements to ensure the long-term stable drainage function and pathways of the seeping slope.
[0004] When conducting research on drainage systems for seepage-prone soil slopes, the inventors of the utility model discovered that the underground drainage system for soil seepage under concrete slopes is prone to blockage over long engineering periods, especially for cohesive soil slopes. The geotextile covering the drainage holes inside and outside can be blocked by soil particles. In this case, the seepage water diffuses to the soil surface through other channels, but due to the blockage caused by the concrete slope, the seepage water cannot be discharged freely. Utility Model Content
[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a concrete slope-supporting structure that ensures drainage and stability of permeable soil slopes. This invention does not restrict free water seepage from the soil surface regardless of whether the drainage holes are blocked, providing an effective seepage channel.
[0006] This utility model provides a concrete slope-supporting structure that ensures drainage and stability of permeable soil slopes, comprising a gravel layer, a composite geomembrane, and a concrete slope-supporting structure laid sequentially on the permeable soil slope; a drainage channel is provided at the bottom of the concrete slope-supporting structure, and the two ends of the drainage channel are respectively connected to the gravel layer and the drainage ditch outside the slope; the gravel layer includes several steel mesh pockets and gravel, the gravel is wrapped in the steel mesh pockets, and the steel mesh pockets are connected to each other to form an integral structure.
[0007] In one embodiment, drainage holes are provided inside the permeable soil slope, and the outlet of the drainage holes is connected to the gravel layer.
[0008] In one embodiment, the steel mesh bag is composed of multiple steel mesh panels welded together, and the steel mesh bags are connected to each other by steel wire binding or on-site welding to form an integral structure.
[0009] In one embodiment, multiple reinforcing bars are connected to the lower layer of the reinforcing mesh of the steel mesh bag, and the reinforcing bars extend downward into the seepage soil slope for fixation. In another embodiment, the concrete slope-supporting layer is provided with anchor piles or anchor cables to achieve combined support.
[0010] In one embodiment, the thickness of the crushed stone layer may be 5-10 cm.
[0011] The beneficial effects of the concrete slope-supporting structure that ensures drainage and stability of permeable soil slopes provided by this utility model are as follows:
[0012] This invention achieves effective collection and orderly discharge of seepage water from a permeable soil slope by sequentially setting a gravel layer, a composite geomembrane, and a concrete slope lining on the surface of the slope, and reserving a drainage channel at the bottom of the concrete slope lining, which together with the internal drainage holes and the gravel layer constitute a continuous drainage system.
[0013] The crushed stone layer uses a structure formed by reinforcing steel mesh and filled with crushed stone, which not only enhances the overall drainage capacity but also avoids the risk of seepage with nowhere to drain after the drainage holes are blocked, significantly improving the long-term stability and reliability of the drainage system. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 A typical cross-sectional schematic diagram of a concrete slope-supporting structure provided for an embodiment of this utility model;
[0016] Figure 2 A partial detailed view of the steel mesh bag provided for an embodiment of this utility model;
[0017] Figure 3 A schematic diagram of the steel mesh basket installation provided for an embodiment of this utility model.
[0018] Attached diagram labels: 1-Drainage hole; 2-Gravel layer; 3-Composite geomembrane; 4-Drainage channel; 5-Concrete slope; 6-Drainage ditch; 7-Reinforcing mesh; 8-Reinforcing bar; 9-Gravel. Detailed Implementation
[0019] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. However, it should be understood that the accompanying drawings are for illustrative purposes only and should not be construed as limiting the present utility model. For better illustration of this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting the present utility model.
[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.
[0021] like Figures 1 to 3 As shown, a concrete slope-supporting structure for ensuring drainage and stability of a permeable soil slope includes a gravel layer 2, a composite geomembrane 3, and a concrete slope-supporting structure 5 sequentially laid on the permeable soil slope. A drainage channel 4 is provided at the bottom of the concrete slope-supporting structure 5, and the two ends of the drainage channel 4 are respectively connected to the gravel layer 2 and a drainage ditch 6 outside the slope. The gravel layer 2 includes several steel mesh pockets 7 and gravel 9, and the gravel 9 is wrapped in the steel mesh pockets 7. The steel mesh pockets 7 are connected to each other to form an integral structure.
[0022] Drainage holes 1 are provided inside the permeable soil slope, and the outlet of drainage holes 1 is connected to the gravel layer 2.
[0023] The crushed stone layer 2 is made by filling precast steel mesh pockets 7 with graded crushed stone. The steel mesh pocket 7 is composed of multiple steel mesh panels welded together. The steel mesh pockets 7 are connected by steel wire binding or on-site welding to form an integral structure. It is more convenient to transport individual steel mesh panels to the site and then lay and fix them.
[0024] Multiple reinforcing bars 8 are connected to the lower layer of the reinforcing mesh of the steel mesh bag 7, and the reinforcing bars 8 extend downward into the seepage soil slope for fixation.
[0025] The concrete slope layer 5 can effectively limit the surface deformation of the seepage soil slope and the loss of soil and water at the seepage point. Based on the stability calculation and analysis of the seepage soil slope, anchor piles or anchor cables are installed in the concrete slope layer 5 to achieve combined support.
[0026] The thickness of the gravel layer 2 is 5~10cm.
[0027] The construction process of this utility model concrete slope 5 structure is as follows: When excavating a seepage-prone soil slope, drainage holes 1 are constructed at the seepage points. System drainage holes 1 are applied simultaneously at the appropriate time. Prefabricated drainage blind drain pipes are inserted into the drainage holes 1. Then, a layer of crushed stone 2 is fully laid on the surface of the seepage-prone soil slope. A composite geomembrane 3 is placed on the surface of the crushed stone layer 2. Finally, concrete slope 5 is poured. A drainage channel 4 is reserved at the bottom of the concrete slope 5 to drain the seepage water drained through the crushed stone layer 2.
[0028] After laying a composite geomembrane 3 on the upper surface of the gravel layer 2, concrete slope protection 5 is poured to seal and support the slope and gravel layer 2, thereby limiting slope deformation at seepage points and limiting soil and water loss.
[0029] Drainage holes 1 in the soil slope are prone to blockage, especially in cohesive soil slopes. However, seepage water can still penetrate to the soil surface through other road channels, and then be collected in the gravel layer 2 to the bottom drainage pipe. Finally, it is collected in the bottom pre-buried drainage pipe and discharged through the drainage ditch 6.
[0030] Based on the description and drawings of this utility model, those skilled in the art can easily manufacture or use the concrete slope-supporting structure of this utility model that ensures drainage and stability of permeable soil slopes, and can produce the positive effects described in this utility model.
[0031] Unless otherwise specified, in this utility model, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this utility model are for illustrative purposes only and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the accompanying drawings and according to the specific circumstances.
[0032] Unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. A concrete slope-supporting structure that ensures drainage and stability of permeable soil slopes, characterized in that: The structure includes a gravel layer, a composite geomembrane, and a concrete slope lining laid sequentially on a permeable soil slope; a drainage channel is provided at the bottom of the concrete slope lining, and the two ends of the drainage channel are respectively connected to the gravel layer and the drainage ditch outside the slope; the gravel layer includes several steel mesh pockets and gravel, the gravel is wrapped in the steel mesh pockets, and the steel mesh pockets are connected to each other to form an integral structure.
2. The concrete slope-supporting structure for ensuring drainage and stability of permeable soil slopes according to claim 1, characterized in that: Drainage holes are provided inside the permeable soil slope, and the outlet of the drainage holes is connected to the gravel layer.
3. The concrete slope-supporting structure for ensuring drainage and stability of permeable soil slopes according to claim 1, characterized in that: The steel mesh bag is composed of multiple steel mesh panels welded together, and the steel mesh bags are connected to each other by steel wire binding or on-site welding to form an integral structure.
4. The concrete slope-supporting structure for ensuring drainage and stability of permeable soil slopes according to claim 3, characterized in that: Multiple reinforcing bars are connected to the lower layer of the reinforcing mesh of the steel mesh bag, and the reinforcing bars extend downward into the seepage soil slope for fixation.
5. The concrete slope-supporting structure for ensuring drainage and stability of permeable soil slopes according to claim 1, characterized in that: The concrete slope layer is equipped with anchor piles or anchor cables to achieve combined support.
6. The concrete slope-supporting structure for ensuring drainage and stability of permeable soil slopes according to claim 1, characterized in that: The thickness of the gravel layer is 5-10 cm.